/*
Copyright 2008-2010 Gephi
Authors : Mathieu Bastian <mathieu.bastian@gephi.org>
Website : http://www.gephi.org

This file is part of Gephi.

DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

Copyright 2011 Gephi Consortium. All rights reserved.

The contents of this file are subject to the terms of either the GNU
General Public License Version 3 only ("GPL") or the Common
Development and Distribution License("CDDL") (collectively, the
"License"). You may not use this file except in compliance with the
License. You can obtain a copy of the License at
http://gephi.org/about/legal/license-notice/
or /cddl-1.0.txt and /gpl-3.0.txt. See the License for the
specific language governing permissions and limitations under the
License.  When distributing the software, include this License Header
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If you wish your version of this file to be governed by only the CDDL
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"[Contributor] elects to include this software in this distribution
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Contributor(s):

Portions Copyrighted 2011 Gephi Consortium.
 */

package org.gephi.desktop.statistics.api;

import javax.swing.event.ChangeListener;
import org.gephi.statistics.spi.Statistics;
import org.gephi.statistics.spi.StatisticsUI;

/**
 * @author Mathieu Bastian
 */
public interface StatisticsModelUI {

    /**
     * Returns the result string for the given <code>StatisticsUI</code> class or
     * <code>null</code> if no result string exists for this statistics.
     *
     * @param statisticsUI a statisticsUI class
     * @return the result or <code>null</code> if not found
     */
    String getResult(StatisticsUI statisticsUI);

    /**
     * Returns <code>true</code> if the statistics front-end is visible, <code>
     * false</code> otherwise.
     *
     * @param statisticsUI an UI instance
     * @return <code>true</code> if the statistics front-end
     * is visible, <code>false</code> otherwise
     */
    boolean isStatisticsUIVisible(StatisticsUI statisticsUI);

    /**
     * Returns <code>true</code> if the UI is in running state, <code>false</code>
     * otherwise.
     *
     * @param statisticsUI an UI instance
     * @return <code>true</code> if the statistics is running,
     * <code>false</code> otherwise
     */
    boolean isRunning(StatisticsUI statisticsUI);

    /**
     * Returns the <code>Statistics</code> instance currently running for the
     * particular <code>StatisticsUI</code> registered or <code>null</code> if
     * the statistics is not running.
     *
     * @param statisticsUI an UI instance
     * @return the statistics instance if it is running, or
     * <code>null</code> if not running
     */
    Statistics getRunning(StatisticsUI statisticsUI);

    /**
     * Returns the report for the given statistics class or <code>null</code> if no report
     * exists for this statistics.
     *
     * @param statistics a statistics class
     * @return the report or <code>null</code> if not found
     */
    String getReport(Class<? extends Statistics> statistics);

    void addChangeListener(ChangeListener changeListener);

    void removeChangeListener(ChangeListener changeListener);
}
